Latex macro in markdown input mangled in latex output

[shvenkat]

I'm using pandoc 1.9.4.2 to convert markdown (with pandoc extensions) to latex. Pandoc mangles the macro with backslash escapes but only if the macro takes arguments. This does not happen if the output format is not latex.

input.md contains:

\newcommand{\plus}[2]{#1 + #2}
$\plus{3}{4}$

"pandoc -f markdown -t latex < input.md" gives:

\newcommand{\plus}

{[}2{]}\{\#1 + \#2\} $\plus{3}{4}$

"pandoc -f markdown -t plain < input.md" gives:

3 + 4

[jgm]

Hm, surprising and undesirable. I see why it is doing this.
src/pandoc.hs sets stateApplyMacros to False if output is latex;
the idea is that latex can apply its own macros. So far so good.
But this also disables macro parsing in the reader, leaving
\newcommand... to be parsed by the markdown reader. I still need
to look into why the whole \newcommand... with its arguments is not
being parsed correctly.

+++ Shiv Venkatasubrahmanyam [Jun 29 12 17:46 ]:

I'm using pandoc 1.9.4.2 to convert markdown (with pandoc extensions) to latex. Pandoc mangles the macro with backslash escapes but only if the macro takes arguments. This does not happen if the output format is not latex.

input.md contains:
\newcommand{\plus}[2]{#1 + #2}
$\plus{3}{4}$

"pandoc -f markdown -t latex < input.md" gives:
\newcommand{\plus}

{[}2{]}\{\#1 + \#2\} $\plus{3}{4}$

"pandoc -f markdown -t plain < input.md" gives:
3 + 4

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[kennknowles]

This fix was authored 7 months ago, while 1.9.4.5 was released 3 months ago, yet I get the same behavior.

Using the example from the User's Guide:

\newcommand{\tuple}[1]{\langle #1 \rangle}

$\tuple{a, b, c}$

$ pandoc --to=latex test.md
\newcommand{\tuple}

{[}1{]}\{\langle \#1 \rangle\} $\tuple{a, b, c}$

$ pandoc test.md  --to=html
<p><span class="math">⟨<em>a</em>, <em>b</em>, <em>c</em>⟩</span></p>

Is this a regression or have I got something wrong or out of date?

[njbart]

This issue is still there: With test.txt containing:

\newcommand{\tuple}[1]{\langle #1 \rangle}
\renewcommand{\tuple}[1]{\langle #1 \rangle}
\providecommand{\tuple}[1]{\langle #1 \rangle}

$\tuple{a, b, c}$

command line: pandoc -t latex test.txt (pandoc 1.10.0.5)

gives:

\providecommand{\tuple}{[}1{]}\{\langle \#1 \rangle\}

$\tuple{a, b, c}$